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Manufacturer Resources
Product Specs
- Cable Size:
- 350 kcmil
- Country Of Origin:
- Mexico (MX)
- Product Group:
- Wire Termination
- Product Type:
- Standard Barrel
- Selling Unit Of Measure:
- each
- Standards:
- UL E9809
- Stud Size:
- 1/2 in
- Sub Brand Label:
- Blackburn
- Type2:
- Cable or wire lug
- Department:
- Electrical
- Product Subgroup:
- Lugs
- Product Color:
- Red
- Product Material:
- Copper
Blackburn CTL3502 – Frequently Asked Questions
1) What cable size does the Blackburn CTL3502 compression lug take?
The CTL3502 is sized for 350 kcmil conductor. It is a copper compression lug, so it goes on copper cable of that size only, not aluminum. If your feeder is a different kcmil, you need the matching die-sized lug rather than this one, since compression barrels are not adjustable.
2) Will the Blackburn CTL3502 bolt to a 1/2 inch stud or bus bolt?
Yes. The tongue is punched for 1/2 inch stud size, so it lands on a 1/2 inch bolt or stud at a breaker pad, bus bar, or ground bar. Note it is a two-hole tongue, so the pad has to have two 1/2 inch holes at the matching spacing, not a single bolt.
3) Can I use the CTL3502 on aluminum conductor?
No. This is a copper-bodied lug specified for copper cable. Aluminum conductor needs an aluminum-bodied or dual-rated AL9CU connector with the correct inhibitor compound. Putting bare copper on aluminum invites galvanic corrosion at the termination.
4) Why is the barrel of this Blackburn lug color coded red?
Red identifies the compression die and die index for the 350 kcmil barrel. Crimping crews match the color and die code on the barrel to the die in the tool so the crimp is made with the correct pressure and profile. The CTL3502 is marked red.
5) Is the Blackburn CTL3502 lug UL listed for electrical inspection?
It carries UL file E9809. That is the reference an inspector or submittal reviewer will want for a copper compression connector on a service or feeder termination.
6) What is the difference between a short barrel and a long barrel compression lug?
A short barrel like the CTL3502 takes fewer crimps and takes up less length behind the pad, which matters in tight gutter space or a crowded panel where the cable cannot be bent back far. A long barrel gives more crimps and more pull-out resistance, so it is the usual pick where vibration or heavy mechanical load on the conductor is a concern and there is room for it. Both terminate the same 350 kcmil copper conductor.
7) Why would I choose a two-hole lug over a single-hole lug on a 350 kcmil feeder?
Two bolts stop the lug from rotating on the pad under fault current or cable pull, and they spread the contact pressure across a larger area of the bus. Many switchgear and generator pads are drilled two-hole for that reason. The CTL3502 is a two-hole tongue on 1/2 inch centers of hole size, so confirm your pad is drilled two-hole for 1/2 inch bolts before you crimp it on.
8) Is the Blackburn CTL3502 sold individually or in a bag?
It is sold each, so you order one per termination. On a three-phase feeder with a neutral that is four pieces per end, eight if you are landing both ends.
9) What is the exact part number and country of origin for this Blackburn lug for my submittal?
Manufacturer part number CTL3502, Blackburn brand, made in Mexico. It is a copper two-hole compression cable lug for 350 kcmil with a 1/2 inch bolt hole size.
How fast can I get the Blackburn CTL3502 delivered?
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Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Blackburn CTL3502 come with a warranty?
Absolutely. The Blackburn CTL3502 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Blackburn CTL3502?
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